Voronoi with inner boundary (rectangular frame)

I have a rectangular frame that I’m trying to fill with a Voronoi but I can’t find a way to include the inner boundary.

Any help appreciated, thanks.

like this?

I have added a pic to my original post. I’m trying to fill in the Voronoi between the two rectangles.

Didn’t expect it to be this straight forward. Thanks for the swift fix!

Would love to see this but won’t bother re-creating code from a screen shot. Any reason not to post the code?

You may want to remove all points inside the inner rectangle before using Voronoi though, now you get some weird small parts along the inner edge.

Done. Thanks for the insight David.